To be a bomb set must have +50 at all time (as soon set get +50 bomb is givved by system (auto) ) anyway if it was posted 3 years ago ,if he will get less than 50 auto-bomb will be removed (if i'm right) . SO as i said at the moment when set was posted LSDB didn't have such tip as bomb, that the way it's isn't bomb now , MSTX or any moder can do this